Yep, same for me - but I did notice that the last android app update introduced the possibility to put fractional weights (before it was just whole lbs or kgs) and this is still working for me today.
Although my weight gets automatically updated from Garmin Connect and this still seems to be working too
So just to confirm: this bug on the website is still there. I’m unable to chance anything on the page, as even my “old” weight seems to be incorrect formated.